ocfs2: Rename ocfs2_meta_[un]lock

Call this the "inode_lock" now, since it covers both data and meta data.
This patch makes no functional changes.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index d1c54da..a61c044 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -34,7 +34,7 @@
 	u64			ip_blkno;
 
 	struct ocfs2_lock_res		ip_rw_lockres;
-	struct ocfs2_lock_res		ip_meta_lockres;
+	struct ocfs2_lock_res		ip_inode_lockres;
 	struct ocfs2_lock_res		ip_open_lockres;
 
 	/* protects allocation changes on this inode. */